i have a lab report needs to be paraphrased

Strength of materials

MET 2120

Lab 3

Meshal Al-Khalil

· Introduction

In this lab we will learn about how to calculate stresses and strains in different parts of a member with the same material, we will learn about how to calculate statically indeterminate problems, calculating the reactions and forces in our material.

· Calculations

· Calculations from ex. 10-15

exaple 10-15
Given	Lac (in)	Lcb (in)	Area ac (in^2)	Area cb (in)^2	Force (lb)
	10	8	6	3	100000

calculated	stress ac	stress cb
	-10.2563	12.82

exaple 10-16
Given	Lac (mm)	Lcd (mm)	Ldb (mm)	Force c (kn)	Force d (kn)
	200	600	300	80	160

calculated	Ra (Kn)	Rb (Kn)
	48	32

· Discussion and equations

In this lab you can find that the highlighted boxes are what we calculated during this lab the rest are given in the example.

· In the first part of the lab we were given an example (ex.10-15) and we had to calculate the axial stress in CB and AC, we used these formulas to solve the equation

·

E= (stress/strain)

= (P/A)/( δ/L)

= (P)(L)/(A)( δ)

ΣFx = Ra+Rb-Pc=0

= Ra+Rb=100

δAC = (PAC)(LAC)/(AAC)(E)

= (-Ra)(10)/(6)(E)

δCB = (PCB)(LCB)/(ACB)(E)

= (Rb)(8)/(3)(E)

δ = Elongation

F = Force

L = length

A = Area

P = Force

· In the second part of the lab ex. 10-16 we had to calculate the different reaction forces, we did this by using the formulas below

ΣFx = -Ra+Pc-Pd+Rb=0

= -Ra+Rb=80 Kn

Rb = (80+Ra)

Ra = (db)/(a+b)

Rb = (da)/(a+b)

d = distance

a = distance a

b = distance b

· Conclusion

I can conclude that in this lab we learned a lot about different stresses, we learned how to calculate statically indeterminate problems, we learned how to calculate different reactions, as well as solving equations with constant area and elasticity

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